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CONTENTS <br />Fag e_ <br />i -viii <br />EXECUTIVE SUMMARY <br />1 -1 <br />1.0 INTRODUCTION <br />1 -1 <br />1.1 Background <br />1 -2 <br />1.2 Regulatory Considerations <br />1 -2 <br />1.2.1 Critical Habitat - Definition and Concept <br />Habitat Designation <br />1 -3 <br />1,2,2 Platte River Critical <br />1 -4 <br />1.3 Scope of Report <br />2 -1 <br />2.0 MIGRATION DYNAMICS <br />2 -1 <br />2.1 Migration Corridor <br />2 -3 2 -3 <br />2.2 Migration Chronology <br />2 -5 <br />2,3 Flock Size <br />2_7 <br />2,4 Fl ight Distances <br />2 -7 <br />2,5 Travel Time <br />Duration <br />2 -10 <br />2,6 Stopover <br />Habitat Use Along the Migration Route <br />2,7 <br />2 -10 <br />2,7 Food Habits and Feeding Habitat <br />2_12 <br />,1 <br />2,7.2 Roosting Habitat <br />Selection Strategy <br />2-19 <br />2,7,3 Habitat <br />3 -1 <br />3.0 WHOOPING CRANE USE OF THE PLATTE RIVER <br />3 -1 <br />3.1 Historical Record <br />3.1.1 The Data of Swenk and Brooking - a Problem <br />3 -1 <br />with Numbers <br />3 -4 <br />3.1.2 Allen's Revised List <br />3-5' <br />3,2 CONFIRMED SIGHTINGS <br />(1940 -1984) <br />3 -5 <br />3,2,1 The Whooping Crane Recovery Team's List <br />Regarding the "Confirmed" Status of 3 -6 <br />3.2.2 Clarification <br />Other Sightings <br />3-7 <br />3.3 Sighting Trends <br />3-7 <br />3.3.1 The 73 -Year Record (1912 -1984) 3 -12 <br />Analysis Based on Confirmed Sigh tin9s <br />3.3.2 Stopover Use <br />3_13 <br />Comparisons with Other Stopover Areas in Nebraska <br />3-16 <br />3.4 <br />3.5 Implications <br />4 -1 <br />4.0 LITERATURE CITED <br />ix <br />